Question about paint scheme and Blood Angels

I'm thinking about starting a BA army and was working around with some schemes and I came to like a mainly dark grey scheme with the red shoulder pads, trim, and the helmet. But my question is it frowned upon to use the BA Codex and have a radically different scheme from the standard?

I'm going with a fluffy army basically a BA force going to a planet which mainly consists of cliffs and mountainous terrain. They're basing reflexs that and they're using the armour to blend in.

So what do u think? Is it frowned upon to stray that much from the original scheme or is it no big deal. Would it be different if I was to use em in tournament play?

This is definitely a case where you want to make up a chapter of your own. Considering all the bright red and gold bling-bling the regular Blood Angels lug around they don't seem to think "blending in" is fashionable.